. The embryology of the honey bee. Honeybee; Bees. 174 THE EMBRYOLOGY OF THE HONEY BEE 2Mx TraB. Fig. 68. Anterior end of a sagittal section laterad of the median plane, from an embryo of Stage XI-XII, showing the development of the deriva- tives of the tracheal invaginations of the second maxillary segment. Hypodermis and brain represented in outline only. Drawn from two sections, x 243. of the two branches previously described (p. 168), supplying the brain and first maxillae, the other forms the smaller branch supplying the dorsal part of the head (Fig. 64). Hatschek (1877) described what he
. The embryology of the honey bee. Honeybee; Bees. 174 THE EMBRYOLOGY OF THE HONEY BEE 2Mx TraB. Fig. 68. Anterior end of a sagittal section laterad of the median plane, from an embryo of Stage XI-XII, showing the development of the deriva- tives of the tracheal invaginations of the second maxillary segment. Hypodermis and brain represented in outline only. Drawn from two sections, x 243. of the two branches previously described (p. 168), supplying the brain and first maxillae, the other forms the smaller branch supplying the dorsal part of the head (Fig. 64). Hatschek (1877) described what he thought were tracheal invaginations on the gnathal segments of embryos of Bombyx, but examinations of Hatschek's plates show that these invaginations are merely those of the tentorium and mandibular apodemes, and this is the interpretation of subsequent embryologists. With this exception there is no record in the literature of the insect embry- ology of tracheal rudiments existing in the gnathal region. It may therefore be inferred either that this phenomenon is peculiar to the honey bee, or else that it is of more or less general occur- rence, but up to the present time has been overlooked. Of these two inferences the latter seems the more probable. If it were not so, it would be difficult to understand why the honey bee, a specialized member of a group generally regarded as highly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nelson, James Allen. Princeton : Princeton University Press
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectbees, bookyear1915
